Pet brush



FIG. 1 is a top perspective view of a pet brush, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines represent environmental subject matter that forms no part of the claimed design. The broken line shown along the perimeter in FIG. 7 represents the bounds of the claim and form no part of the claimed design. 

CLAIM The ornamental design for a pet brush, as shown and described. 